Mode of



HANDLY: B. KIMBALL, OF CHARLQTTE, MICHIGAN.

Letters Patent No. 84,699, dated December 8, 1868.

MODE OF APPLYING CRY$TAL FROSTING- TO GLASS.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern:

Be it known that I, HANDLY B. KIuBALL, of Oharlotte, in the county'ofEaton, and State of Michigan, have invented a new and useful applicationand adaptation of the property of crystallization in certain bodies, fordepositing and preserving an efflorescence upon the surface of glass,and make it more or less opaque and ornamental; and I do herebydeclarethat the following is a full, clear, and exact description of the same.

This fixed ornamentation of glass I denomin te Crystal Frosting, anddesign its use, more especially, for window-lights, to lessen theirtransparency, and produce a cooling effect, by reason of the associationof ideas with the efflorescence produced on glass by frost in extremelycold weather. v

I employ, for my crystal frosting, any of the crystallizable salts whichwill readily dissolve in soft 'water, and, when spread over the surfaceof glass, will effloresce in a sufficiently ornamental manner whiledrying.

I find the following to be the best solutions for producing imitationsof the effect of frost upon glass, to wit: 7

No. 1. As much oxalic acid as can be held in solution in pure softwater.

No. 2. One part of sulphate of magnesia, dissolve in about four parts ofsoft water.

No. 3. Sugar of lead, in soft water, same proportion as in No. 2. I

After cleaning the glass to be frosted, I flow one side of it with thesolution, and, provided I wish the development of a full and uniformeffiorescence over the whole surface, I place it in a horizontalposition, and allow full time for the crystals to form, while thesolution is slowly drying in a moderate temperature.

1f dried quickly-in a high temperature, the crystals are shorter andmore compact, and in this way an effect may be prodncedresembling groundglass, or that produced in the old style of frosting, viz, by pounciug athin layer of white-lead paint.

This difference in the crystal formations enables the I operator, by askiiful manipulation with a spirit-lamp,

(or in any other convenient manner, causing the solu-' tion on the glassto dry irregularly,) to produce a beautifully-diversified cheat, ininfinite variety, on the glass, My crystal frosting mayjoe tinted withany suitable coloring-matter that will readily mix with any of thesolutions before they are spread on the glass, some of the aniline dyesproducing a fine efi'ect.

After the solutions are thoroughly dried, in manner substantially asaforesaid, I cover and protect the crystalline formations with one ormore coats of the best copal, dammar, or other suitable transparentvarnish,

which becomes hard when dry, so as to bear lubbing or washing, and theprocess of manufacture is complete.

Having descn'bed my invention,

What I claim as new, and desire to secure by Let

